Plant-availability to barley of phosphorus in ash from thermally treated animal manure in comparison to other manure based materials and commercial fertilizer

摘要: Abstract Phosphorus (P) is an essential nutrient and a limited resource, yet excess P applied to agricultural land can cause environmental problems in areas with intensive animal farming. In this study, the fertilizing effects of several manure-based products (including thermal treatment) were tested after application two soil types (Jyndevad soil: clay 5.1%, silt 4.1%, sand 88.9%, organic matter 2.1%, total C 1.2% dry (DM), 266 mg kg−1 DM, pH 6.3; Ronhave 15.4%, 32.6%, 49.6%, 2.3%, Total 1.3% 488 mg kg−1 6.6). The first-year effect was spring barley crop (Hordeum vulgare L.) residual perennial ryegrass (Lolium perenne following year. Untreated ash from thermally gasified manure biogas residue (GA) corresponding neutralized acid extract (ExL) liquid form focus. Other use were: pelletized pig (PEL), incinerated PEL (IA), anaerobically digested slurry (DS), dried ExL, fraction separated (SS), SS (GAs), poultry (GAp), crushed triple super phosphate (TSP) disodium (DSP) used as reference fertilizer. For 20 kg P ha−1 mineral fertilizer replacement value (RV) second year sandy 76% 99% for GA, 79% 123% IA, 95% 155% PEL, 94% 73% 55% 15% ExD, 64% 82% SS, 104% 109% DS, 60% GAp, 111% GAs, where first based on DM yield uptake. Tripling GA rate 60 kg P ha−1 both soils had no significant overall efficiency fertilizers much higher than solid ones relative effectiveness (RE) ExL comparable RE DSP. Despite low level soils, grew very well year, there detectable treatments grass conclusion, untreated manures study not suitable starter fertilizer, but could be maintain available soil, indications that ash/manure contributed significantly plant uptake during growing season barley.